Filson long johns are knit from extremely fine fibers, that result in a smooth finish from the yarn's tight "worsted" twist and unparalleled comfort that lasts. Wool absorbs up to 30% of its own weight in moisture without feeling damp or clammy, and wool helps neutralize odor too. Smooth fit for layering yet cut generously enough for ease of movement. Features include an elastic waistband and ribbed ankle cuffs. Imported.